Largest cut hibonite

According to Official Guinness Records,

The largest cut hibonite weighs 23.66 carats (4.73 g, 0.17 oz) and is owned by Ophir Collection, LLC (USA) on 14 February 2014.
The hibonite is a mineral containing aluminum, iron, cerium, calcium, magnesium, lanthanum, oxygen, and titanium.

For a complete list of 2014 records, please visit 2014 Guinness Records in United States.

Related Images

Other United States records that might interest you:

• Farthest reverse ramp jump by car
• Largest hi-definition television screen at a sporting venue
• Largest hi-definition LED screen
• Most bow ties tied simultaneously
• Most people playing draughts (checkers) simultaneously